I don't know how I would have access to food, shelter, and healthcare if I decided to stop working and spend the rest of my life doing recreational engineering. Post-scarcity requires automation to the point that the cost of survival becomes a rounding error on the rest of the economy. When it's possible to survive without engaging in trade (or spending the majority of your life gathering food and shelter from raw materials), we'll be in a post-scarcity economy (and I will be first in line to take the offer).